MICROBIOLO
GY AND
IMMUNOLOG
1
,OVERVIEW
, 01) Physical and
WHAT IS chemical barriers
Skin, mucus, tears and saliva stop most
IMMUNITY? germs before they even enter the body.
The Latin term immunis meaning “exempt,” is the
source of the English word immunity, meaning the 02) Innate
state of protection from infectious disease.
The Immune system is a remarkably versatile defence
immunity
A general, inbuilt defense system present
from birth- acts the same way against any
germs .
system that has evolved to protect animals from
invading pathogenic microorganisms and cancer. It is
able to generate an enormous variety of cells and
molecules capable of specifically recognizing and 3
eliminating an apparently limitless variety of foreign
03) Acquired
invaders.
immunity
An adaptive, specific defense mechanism
that develops after exposure to a particular
pathogen or a vaccine.
These cells and molecules act together in a dynamic
network whose complexity rivals that of the nervous
system. Together, these systems make sure the body
can recognise and destroy invaders while
leaving its own cells unharmed.
GY AND
IMMUNOLOG
1
,OVERVIEW
, 01) Physical and
WHAT IS chemical barriers
Skin, mucus, tears and saliva stop most
IMMUNITY? germs before they even enter the body.
The Latin term immunis meaning “exempt,” is the
source of the English word immunity, meaning the 02) Innate
state of protection from infectious disease.
The Immune system is a remarkably versatile defence
immunity
A general, inbuilt defense system present
from birth- acts the same way against any
germs .
system that has evolved to protect animals from
invading pathogenic microorganisms and cancer. It is
able to generate an enormous variety of cells and
molecules capable of specifically recognizing and 3
eliminating an apparently limitless variety of foreign
03) Acquired
invaders.
immunity
An adaptive, specific defense mechanism
that develops after exposure to a particular
pathogen or a vaccine.
These cells and molecules act together in a dynamic
network whose complexity rivals that of the nervous
system. Together, these systems make sure the body
can recognise and destroy invaders while
leaving its own cells unharmed.
